The Florida case has become a flashpoint in separate but converging national debates over self-defense, guns, and race relations. Zimmerman, who successfully claimed that he was protecting himself when he shot Martin, identifies himself as Hispanic. Martin was black.

For some attendees, particularly those who are black, the rallies seemed as much about those larger issues as about the verdict.

“It’s personal,” said Cincinnati resident Chris Donegan, whose 11-year-old son wore a hoodie to the rally, as Martin did the night he died. “Anybody who is black with kids, Trayvon Martin became our son.”

Fulton told the crowd she was determined to fight for societal and legal changes needed to ensure that black youths are no longer viewed with suspicion because of their skin color.

“I promise you I’m going to work for your children as well,” she told the crowd.

At a morning appearance at Sharpton’s headquarters in Harlem, she implored people to understand that the tragedy involved more than Martin alone. “Today it was my son. Tomorrow it might be yours,” she said.

In Atlanta, speakers noted that the rally occurred in the shadows of federal buildings named for two figures who had vastly differing views on civil rights and racial equality: Richard B. Russell was a Georgia governor and U.S. senator elected in the Jim Crow South; Martin Luther King Jr. is the face of African-Americans’ civil rights movement.

“What’s so frightening about a black man in a hood?” said the Rev. Raphael Warnock, who now occupies the pulpit at King’s Ebenezer Baptist Church.

“History would suggest that we have plenty of data to be worried when we see other folk moving through our neighborhoods in hoods. Some of them have on pinstripe suits – but in their hearts, they’re wearing a hood.”

In addition to pushing the Justice Department to investigate civil rights charges against Zimmerman, Sharpton told supporters In New York that he wants to see a rollback of “stand your ground” self-defense laws.

“We are trying to change laws so that this never, ever happens again,” Sharpton said.

“Stand your ground” laws are on the books in more than 20 states, and they go beyond many older, traditional self-defense statutes. In general, the newer laws eliminate a person’s duty to retreat, if possible, in the face of a serious physical threat.

Zimmerman didn’t invoke “stand your ground,” relying instead on a traditional self-defense argument, but the judge included a provision of the law in the jurors’ instructions, allowing them to consider it as a legitimate defense.